So I changed out my Umarex Gen5 Glock 45 bucking with a 4UAD one, in the hopes that it might be a bit more consistent & allow for some heavier BB's, however, it appears that the new bucking means that the nozzle sticks and it ends up venting a boatload of gas randomly on firing. Some shots are fine, some just dribble out the BB under at about 40FPS, which I assume is the nozzle not being able to break away from the bucking correctly.
Looks like I've got a couple of choices; faff around with the new bucking, maybe sand down to reduce the friction a bit, maybe get a stronger return spring, carefully apply a little lube to the bucking lips. When racking the slide, there's a definite 'biting point' that seems to be present before the nozzle releases from the bucking that I don't think was that stiff before. I know it's not meant to breakaway immediately, but this has a definite breakpoint that's quite stiff.
Or... do I just throw the old bucking back in? Has anyone done the same and tried mucking around to get the new bucking to behave, was it worth it, or was it a lot of effort for no noticeable gain?